نتایج جستجو برای: malignant schwannoma

تعداد نتایج: 216128  

Journal: :BMC Urology 2007
Peter T Chan Sankalp Tripathi Su E Low Lee Q Robinson

BACKGROUND Scrotal schwannoma is a rare neoplasm and poses a diagnostic challenge to urologists. This article describes a rare case of ancient scrotal schwannoma and reviews the current modality of investigation and treatment of this tumour. CASE REPORT A 28 year old man presented with a 3-month history of an asymptomatic scrotal swelling. Ultrasonography and computer topography revealed an i...

Journal: :Oncology reports 2008
Miljenko Bura Vesna Musani Maja Cretnik Iva Botica Sonja Levanat

Transition from malignant schwannoma to malignant triton tumor is analyzed in a case report on a patient with recurring cancers and suspected familial predisposition. It is hypothesized that rhabdomyoblastic differentiation, which distinguishes triton from schwannoma, might be attributable to Hedgehog-Patched pathway malfunctioning. Loss of one Patched gene allele was found in the tissue of adv...

2015
G. Iannaci M. Crispino P. Cifarelli M. Montella I. Panarese A. Ronchi R. Russo G. Tremiterra R. Luise P. Sapere

BACKGROUND Schwannoma and angiosarcoma are infrequent pathologies that have been rarely reported in the kidney. Angiosarcoma is an uncommon malignant tumor presenting a recognizable vascular differentiation. It can develop in any site but the most common locations include the skin, soft tissues, breast, bone, liver, and spleen while renal localization has been very rarely reported in the litera...

2014
Hassadin BOONSRIROJ Kazunori KIMITSUKI Tetsuya AKAGI Chun-Ho PARK

A malignant epithelioid schwannoma of the oral cavity was diagnosed in an 8-year-old domestic short-hair cat. The mass was located in the gingiva of the upper left premolar to molar region and showed multinodular growth patterns. The mass comprised epithelioid cells arranged in densely packed sheets. Tumor cells had large, round to oval nuclei with prominent nucleoli and an abundant eosinophili...

Journal: :The Canadian journal of neurological sciences. Le journal canadien des sciences neurologiques 2016
Rachael A Vaubel Howard T Chang Karen Fritchie Patrice C Abell Aleff Mark E Jentoft

Even though the diagnosis of schwannoma is usually straightforward in lesions with classic features, tumors with predominantly epithelioid morphology or marked myxoid change may present a diagnostic challenge. There are relatively few reported cases of epithelioid schwannoma entirely lacking classic morphology, and these have occurred in subcutaneous tissues, mucosal surfaces, or as gastrointes...

2015
Giuseppe Cavallaro Giada Pattaro Olga Iorio Marcello Avallone Gianfranco Silecchia

Cervical vagal schwannoma is a benign, slow-growing mass, often asymptomatic, with a very low lifetime risk of malignant transformation in general population, but diagnosis is still a challenge. Surgical resection is the treatment of choice even if its close relationship with nerve fibres, from which it arises, threats vagal nerve preservation. We present a case report and a systematic review o...

Journal: :Journal of the College of Physicians and Surgeons--Pakistan : JCPSP 2014
Erkam Komurcu Burak Kaymaz Gurhan Adam Ferhat Gokmen Asli Murath

Schwannomas are the most common benign neoplasms of the peripheral nerves in the upper extremity originating from the schwann cells of nerve sheath. They account for 5% of all tumours in upper extremity. Schwannomas are usually solitary, encapsulated and homogeneous masses and present with slowly growing masses, sometimes associated with pain and paresthesia. Pre-operative evaluation is based o...

Journal: :World Journal of Surgical Oncology 2005
Fumihiro Shoji Riichiroh Maruyama Tatsuro Okamoto Hiroshi Wataya Kenichi Nishiyama Yukito Ichinose

BACKGROUND Malignant schwannoma of the upper mediastinum originating from the vagus nerve is extremely rare. CASE PRESENTATION A 46-year-old female was admitted for a left cervical mass which was associated with both hoarseness and Horner's syndrome. Chest computed tomography showed a mass extending from the left upper mediastinum to the left supraclavicular area. A fine needle aspiration cyt...

2009
Eugen Târcoveanu Gabriel Dimofte Costel Bradea Radu Moldovanu Alin Vasilescu Raluca Anton Dan Ferariu

BACKGROUND Adrenal schwannomas are very rare tumors that are difficult to diagnose preoperatively. We report the case of a left adrenal schwannoma incidentally discovered in a 55-year-old man during a postoperative checkup for a cutaneous malignant melanoma. METHODS The biological evaluation was unremarkable, and the radiological examination revealed the adrenal mass that was first considered...

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